Heating furnace



Aug. 21, 1945. H. wl-:YENBERG HEAT ING FURNACE Filed Deo. 28, 1940 Gttorneg Patented Aug. 2l, 1945 'l 1.

UNITED STATES PATENT OFFICE HEATING FURNACE Henry Weyenberg, Holland, Mich., assigner to Holland Furnace Company, Holland, Mich., a corporation of Delaware Application December 28, 1940, Serial No. 372,115

My invention relates to improvements in heating furnaces, and particularly to furnaces employed for heating buildings such as dwellings, stores and the like; and its objects are, first `to provide a heating furnace that' will be more efficient than furnaces heretofore employed for like service; second, to provide a heating furnace that will be simple and readily understood; third, to provide a heating furnace of which the interior parts are readily accessible.

Other objects and advantages of the invention will appear from the following description taken in connection with the drawing in which the figure is 'a sectional view taken at a vertical plane extending from front to back of the furnace about mid-way between the side walls of the casing which has mounted therein a fire pot and burner adapted for burning fuel oil.

Numeral I refers to the base portion of the furnace as a whole, of which 2 is the sheet metal casing having at its front an opening closed by a removable door 3 and at one of its sides a second opening having a screen 4 extending over it through -which air can be drawn and delivered through a diaphragm by a blower 6 into the interior of the portion 1 of the furnace. This portion 1 has an outer casing l of sheet metal,

and an inner casing or heat defiector frame 3 provided at its' lower end with an inwardly and upwardly inclined diaphragmflange I0. Rods II extend from the bottom of the furnace upwardly through the opening formed by the flange I0, and through slotted brackets I2 which guide the upper ends of said rods into engagement with brackets I3 secured to the outer wall surface of the combustion chamber I4 so that the rods assist in supporting the radiator I5. Numeral I B denotes a heat conducting passage or flue extending from the combustion chamber I4 to the radiator I5; and said radiator has near its bottom at one of its sides a products-of-combustion flue I1 for connecting the furnace with'a chimney or stack (not shown). Extending from the combustion chamber I4 to the front of the furnace is a tube I3 through which the condition of combustion may be observed; y,this tube also assists the brackets I3 in supporting the burner housing 23 to which they are secured.

The burner housing 20 has at its upper rim 2| a channel 22 containing a heat-resisting plastic packing 23, on which rests the lower edge 24 of the wall of the combustion chamber I4. The inner wall of the channel 22 has a ledge portion flange 28 of the fire pot 21, in which fuel oil is burned. The fire pot 21 is provided with perforations 35 in its side walls and the liquid fuel is delivered into the bottom wall 38 of the fire pot through a tube 31 in a protective casing 35.

Below the re pot 21 there is secured to the housing 2l) a .diaphragm 39 having a central opening 33' and supporting an air feed fan 40 together with its electric motor 4I within the cone-shaped bottom shell 42 of the housing 20. The said fan 40 and its motor are removable when it is desired to operate the furnace without forced draft; and the cone-shaped bottom is provided with an air inlet tube 43 through which access may be had to the fan and its motor for adjustment or control thereof.

The top of the furnace casing 8 is closed by a cover which may be flat as shown, or which may be either depressed or of upwardly extending conical form if desired, and which is fitted with an upwardly extending heat conductor flue 45 by which heated air is conducted from the furnace to a room or space to be heated. The

observation tube I8 is closed by an ornamental hinged door 46, except when observation of the nre is being made.

In the operation of my improved heating furnace. liquid fuel, such as oil, is admitted to the fire pot 21 where it spreads over the bottom wall 38 and is ignited and burned with the assistance of. air forced into the fire pot through the holes 35 by the fan 40 driven by its motor 4I, this air being supplied from outside the furnace through the air inlet tube 43 and delivered through the opening 39' in the diaphragm 39 to the interior of the burner housing 20 surrounding the fireV pot, and thence through said holes 35 in the re pot wall. The fuel spread over the bottom of the fire pot, when ignited, creates a flame which ,rises into the combustion chamber I4 and exblower 8 is put in operation and draws air into the lower housing portion I of the furnace y through the screen 4 located at one side of said lower housing portion. The purpose of the screen the furnace and conducted through the heat conductor pipes to the' rooms being heated. As the air leaves the blower it is deflected by the conical bottom 62 of the burner housing, a portion of said air passing through the opening in the dia phragm flange I0 as it iiows upward into the space within the frame 9 and surrounding the combustion chamber I4. As shown in the drawing, there is also a iiue space leading upwardly between the combustion chamber I4 and the radiator I5 providing a passage for a portion of the air which passes through the opening in the flange I0. In addition, a part of the air deflected by the cone-shaped bottom 42 of the burner housing flows upward between the outer casing 8 and the frame 9. These three streams of air are reunited in the upper portion of the furnace and pass therefrom in highly heated condition through the outlet flue 45 leading to the rooms to be heated.

'I'he electrical and thermostatic instruments for controlling the operation of the air blower 8 and draft fan 40, the delivery offuel to the burner, and the temperature of the heated air iiowing from the furnace are not shown in the drawing, or described, as they may be of any make or type of such instruments as can be purchased in the open market and form no part of the present invention. The recess Il provides a convenient space in which the several control instruments are mounted, preferably by attachment to the back vertical wall of the depression.

I claim as my invention:

In a heating furnace, the combination with a housing having a plurality of sections in vertical assembled relation with one of the sections having a screen at one of its sides, and a diaphragm extending over its top and a blower having its discharge portion extending to an opening in the diaphragm: A fire pot having a plurality of holes extending through its side wall for permitting air to flow into the flre pot, and a housing surrounding the fire pot, an inverted cone-shaped housing portion secured to the housing surrounding the'flre pot with a hollow tube extending to the said housing from exterior of the furnace for permitting air to enter the inverted cone housing and a fan for drawing air from the inverted cone housing and forcing the air through the holesextending through the wall of the nre pot and upward into a combustion chamber and heat radiator having open connection with the combustion chamber, substantially as described.

HENRY WEYENBER. 

